CVE-2021-20864

Improper access control vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent unauthenticated attacker to bypass access restriction, and to start the telnet service and execute an arbitrary OS command via unspecified vectors.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
8.8 HIGH
ADJACENT_NETWORK
LOW
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
jpcertCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 47%
VendorProductVersion
elecomwrc-1167gst2_firmware
𝑥
≤ 1.25
elecomwrc-1167gst2a_firmware
𝑥
≤ 1.25
elecomwrc-1167gst2h_firmware
𝑥
≤ 1.25
elecomwrc-2533gs2-b_firmware
𝑥
≤ 1.52
elecomwrc-2533gs2-w_firmware
𝑥
≤ 1.52
elecomwrc-1750gs_firmware
𝑥
≤ 1.03
elecomwrc-1750gsv_firmware
𝑥
≤ 2.11
elecomwrc-1900gst_firmware
𝑥
≤ 1.03
elecomwrc-2533gst_firmware
𝑥
≤ 1.03
elecomwrc-2533gst2_firmware
𝑥
≤ 1.25
elecomwrc-2533gsta_firmware
𝑥
≤ 1.03
elecomwrc-2533gst2sp_firmware
𝑥
≤ 1.25
elecomwrc-2533gst2-g_firmware
𝑥
≤ 1.25
elecomedwrc-2533gst2_firmware
𝑥
≤ 1.25
𝑥
= Vulnerable software versions
References
https://jvn.jp/en/vu/JVNVU94527926/index.html
https://www.elecom.co.jp/news/security/20211130-01/
https://jvn.jp/en/vu/JVNVU94527926/index.html
https://www.elecom.co.jp/news/security/20211130-01/